I am using chart type as column for my live chart , i am getting data with respect to time , at initial stage data-points (data vs time) are less numbers so the width of the columns in the chart is displaying large and as data is growing (data-points are large number) then the width becoming reduce .

my quiestion is :
1.is there any option to change column width so that i want display fixed column width chart how much live data it is getting from database.

Yes, it is possible to change the size of column inside the library. You can make a change in Property maxBarWidth inside renderColumn controls the width of bar. It can be controlled by changing .15 (fraction of chart’s width) as required at line number 4353 of 1.5 GA.